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A186048
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Number of (n+2)X7 binary arrays with each 3X3 subblock singular
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1
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434174, 23369314, 1231779874, 56374248542, 2795398080908, 137706977983060, 6706785849517148, 329259361852366620, 16148770445584988556, 791374910346450939836, 38812042507333999328862, 1903281945814156244309626
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for 4X7
..0..0..0..1..0..1..1....0..0..0..1..1..0..0....0..0..0..1..1..0..0
..0..0..0..1..0..0..0....0..0..0..0..1..0..1....0..0..1..0..0..0..0
..0..0..1..1..0..0..1....0..0..0..0..1..0..1....0..0..0..1..1..0..1
..0..0..0..1..0..1..1....0..0..0..0..0..0..0....0..0..1..0..0..1..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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